Drilling-machine.



No. 667,080. Patontedlan. 29, l90l.

B. GALLAGHER.

DRILLING MACHINE.

(Application filed Apr. 16, 1900.) (No Model.)

2 Sheats-$hoei l.

No. 667,080. Patented Jan. 29, real.

- B. GALLAGHER.

DRILLING MACHINE. (Abpiieat ion filed Apr. 18, 1900.

2 Sheets-Sheet 2.

(No Model.)

m: NORRIS warms cm. PHOTOLITHOH \AASHINGTON. a c

' PATENT FF ICE.

BERNARD GALLAGHER, OF LYNN, MASSACHUSETTS.

-IVlACHlNE.

SPECIFICATION forming part of Letters Patent No. 667,080, dated January 29, 1901.

Application filed April 16, 1900- Serial No. 12,970. (No model.)

To all whom it may concern;

Be it known that I, BERNARD GALLAGHER, a citizen of the United States,residing at Lynn, in the county of Essex and State of Massachusetts, have invented certainnew and useful Improvements in Drilling-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to drillingmachines, and more particularly to drillingmachines for drilling holes in the webs of steel rails, girders, and similar structures.

In all drilling-machines of the prior art for drilling steel and iron the opposing strains placed upon the frame and drill as the drill enters the steel have a'tendency to lift the frame and cause the drill to bend in the bore, thus greatly increasing the labor of drilling and often causing the drill to break off.

The object of the present invention is to produce a drilling-machine which will be so support-ed that it may maintain its proper alinement no matter how-much its frame may have a tendency to lift, thus doing away with the tendency of the drill to bind in the hole being drilled and removing the breaking strains therefrom.

To the above end the present invention consists of the devices and combinations of de vices, which will be hereinafter described and claimed.

The present invention is shown in the accompanying drawings, in which Figure 1 shows in front elevation a drill embodying the same. Fig. 2 shows a vertical section taken on the line w m, Fig. 1, and Fig. 3 shows a sectional detail of the drilladvancing mechanism.

Similar letters of reference will be employed throughout the specification and drawings to designate corresponding parts.

The machine of the drawings comprises a suitable supporting-frame comprising vyokes a, b, and c and side standards d. The side standards at are supported by the yoke a and have a sliding movement in guides b of the yoke b and at their lower ends, beneath the yoke 19, support the yoke c. The yoke b has suitable slots or bearings W, in which are re; ceived the supporting-bars e, which, as shown in Fig. 2, are of a length to extend across and rest on the upper surface of two adjacent rails r to support the drill in proper position, the said supporting-bars 6 being provided with hook-shaped ends 6 to take over the top of the rail and resist the thrust of the drill. The supporting-bars e are connected by suitable cross-bars e and e and the drill-frame may be adjusted along said supporting-bars, as will be clearly apparent from the drawings, and held in its adjusted position by means of set-screws b Supported by the yoke c is a drill-supporting carriagef, which is pivotally connected at f to the depending lugs c of the yoke c, the arrangement being such that no matter what strains may be placed on the frame of the machine the drill-carriage may always maintain the drill in proper alinement with the hole being bored, and thus prevent the binding of the drill therein.

The drill-supporting carriagefcarries bearingsf andf, the bearing f supporting a hollow threaded shaft f the threads of which fit corresponding threads in the bearing f and the bearing f supports, so that it may freely turn and slide therein, the chuck-shaft f carrying the drill-chuck f. The chuck-shaft f has a reduced portion f which passes through the hollow shaft f and said shaft f at its rear end receives a ratchet g, secured thereto by a set-so row 9, and also a hand-wheel 9 secured thereto by a set-screw g the said handwheel being preferably recessed, as shown at g", to receive a nut f screwed on the end of the reduced portion f of the chuck-shaftf The drill-supporting carriage is yieldingly held in position by means of springs f and f bearing against the opposite faces of upwardly-projecting lugs f, which are apertured, as at f, to permit the passage of the headed studs f fastened in the yoke c, and which studs support the springs f and f The drill h is secured in any suitable mannor in the chuck f and the chuck-shaft is rotated to rotate the drill h by means of a bevelgear 11, which is splined to the chuck-shaft f and through which said shaft may freely move, and a bevel-gear 1L, which is secured to the lower end of a vertical shaft 11 mounted to turn in suitable bearings c and a, re-

spectively, of the yokes c and a, and which shaft at its upper end carries a bevel-gear i which meshes With a bevel-gear 6 carried by a horizontal shaft 11 mounted to turn in bearings a of the yoke a and provided at its opposite ends with wheels 2', each of which is provided with a crank t all as usual in machines of this character.

The aboy e arrangement is such that a rotation of the shaft i will through the connecting mechanism just described impart a rotary movement to the chuck-shaft f and the drill h.

The hollow shaftf carries a head j, which bears against a collar f of the chuck-shaft f and a turning of the shaft f in its bearings f will cause a movement of the chuckshaft f through its bearingf This longitudinal movement of the chuck-shaft to carry the drill against the work is usually an incremental movement produced by the engagement of the ratchet-wheel g by means of a s iiring-pressed pawl g carried by a pawl-oarrier g, supported to turn on the ratchet-Wheel g, the pawl-carrier being rocked from side to side by means of a long lever g which extends n p vertically through a guide-frame a, supported by the yoke a. The engaging surfaces on the ratchet-wheel and pawl-carrier are curved to form a universal joint, so that said wheel and the pawl mounted in said carrier shall be maintained in operative relation to each other independent of the angle between the shaft f and the hand-lever g.

\Vhen the pawl g is in engagement with the ratchet-wheel g, a rocking of the pawlcarrier g from side to side by means of the hand-lever g will cause an incremental advancement of the chuck-shaft and drill toward the work.

By .lifting the pawl and turning it so that the pin q will engage the notches 9 its lower end will be disengaged from the ratchetwheel, so that the hollow shaft f" may be rapidly turned by the hand-Wheel g to draw back the chuck-shaft and drill.

The point of operation of the drill may be vertically adjusted by raising or lowering the yoke c, which may be conveniently accomplished by means of the vertical shaft 70, which is threaded at its opposite ends, as at and engages threaded bearings in the yoke a and the supporting-yoke Z), said shaft being provided with a handwheel 70 whereby it may be turned as desired.

For the purpose of facilitating the transfer of the machine from point to point along the rails r or otherwise moving it it may be provided with a horizontal bar m long enough to project some distance at opposite sides thereof and fastened to the side bars 01 in any suitable manner.

The operation of my machine has been sufficiently described in connection with the foregoing description of its form and arrangement, and further description thereof is deemed unnecessary.

Having described the construction and mode of operation of my invention, I claim as new and desire to protect by Letters Patent of the United States 1. In a drilling-machine, the combination with a drill, of a pivotally-supported carriage therefor arranged to tip with relation to the plane of the work to automatically maintain the drill in proper alinelnent with the work, substantially as described.

2. In a drilling-machine, the combination with a drill, of a spring-controlled pivotallysupported carriage therefor arranged to tip with relation to the frame of the machine, substantially described.

3. A rail-drilling machine, having, in combination, a frame, adapted to rest upon the rails, a drill-carriage pivotally supported on said frame, a drill and mechanism for driving it, substantially as described.

4. A rail-drilling machine, having, in combination, a frame adapted to rest upon the rails, a d rill-carriage supported on said frame, means for vertically adjusting said carriage with respect to said frame, and a drill and mechanism for driving it, substantially as described.

5. A rail-drilling machine, having, in combination, a frame adapted to rest upon the rails, a drill carriage pivotally supported thereon, a drill and driving and feeding mechanisms therefor, and an actuating device for said feeding mechanism, connected therewith by a universal joint, substantially as described. v

In testimony whereof I affix my signature in presence of two witnesses.

BERNARD GALLAGHER.

Witnesses:

HORACE VAN EVEREN, ALFRED H. HILDRETH. 

